Refactor fuchsia_precache (#145978)

Refactor fuchsia_precache suite in order to reduce testing logic in test.dart and allow for later implementing package:test onto the existing fuchsia_precache tests

Part of https://github.com/flutter/flutter/issues/145482

dev/bots/suite_runners/run_fuchsia_precache.dart

@@ -0,0 +1,31 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import '../run_command.dart';
+import '../utils.dart';
+
+// Runs flutter_precache.
+Future<void> fuchsiaPrecacheRunner(String flutterRoot) async {
+  printProgress('${green}Running flutter precache tests$reset');
+  await runCommand(
+    'flutter',
+    const <String>[
+      'config',
+      '--enable-fuchsia',
+    ],
+    workingDirectory: flutterRoot,
+  );
+  await runCommand(
+    'flutter',
+    const <String>[
+      'precache',
+      '--flutter_runner',
+      '--fuchsia',
+      '--no-android',
+      '--no-ios',
+      '--force',
+    ],
+    workingDirectory: flutterRoot,
+  );
+}

dev/bots/test.dart

@@ -69,6 +69,7 @@ import 'suite_runners/run_analyze_tests.dart';
 import 'suite_runners/run_customer_testing_tests.dart';
 import 'suite_runners/run_docs_tests.dart';
 import 'suite_runners/run_flutter_packages_tests.dart';
+import 'suite_runners/run_fuchsia_precache.dart';
 import 'suite_runners/run_realm_checker_tests.dart';
 import 'suite_runners/run_skp_generator_tests.dart';
 import 'suite_runners/run_web_long_running_tests.dart';
@@ -256,7 +257,7 @@ Future<void> main(List<String> args) async {
       'realm_checker': () => realmCheckerTestRunner(flutterRoot),
       'customer_testing': () => customerTestingRunner(flutterRoot),
       'analyze': () => analyzeRunner(flutterRoot),
-      'fuchsia_precache': _runFuchsiaPrecache,
+      'fuchsia_precache': () => fuchsiaPrecacheRunner(flutterRoot),
       'docs': () => docsRunner(flutterRoot),
       'verify_binaries_codesigned': _runVerifyCodesigned,
       kTestHarnessShardName: _runTestHarnessTests, // Used for testing this script; also run as part of SHARD=framework_tests, SUBSHARD=misc.
@@ -1199,31 +1200,6 @@ Future<void> _runWebUnitTests(String webRenderer, bool useWasm) async {
   await selectSubshard(subshards);
 }
 
-// Runs flutter_precache.
-Future<void> _runFuchsiaPrecache() async {
-  printProgress('${green}Running flutter precache tests$reset');
-  await runCommand(
-    'flutter',
-    <String>[
-      'config',
-      '--enable-fuchsia',
-    ],
-    workingDirectory: flutterRoot,
-  );
-  await runCommand(
-    'flutter',
-    <String>[
-      'precache',
-      '--flutter_runner',
-      '--fuchsia',
-      '--no-android',
-      '--no-ios',
-      '--force',
-    ],
-    workingDirectory: flutterRoot,
-  );
-}
-
 // Verifies binaries are codesigned.
 Future<void> _runVerifyCodesigned() async {
   printProgress('${green}Running binaries codesign verification$reset');